Refer to the exhibits.

The network administrator enters the commands shown in Exhibit 2, and Switch-1 and Switch-2 exchange keepalive messages. What is the expected behavior if Switch-1 later fails to receive keepalive messages from Switch-2?
Refer to the exhibit.
The exhibit shows configurations for interface 5 and VLAN 20. Note that DHCP snooping and ARP protection are also enabled.
A network administrator finds that interface 5 on an AOS-Switch is disabled. The administrator re-enables the interface, but it shuts down again. What should the administrator investigate?
Refer to the exhibits.
Exhibit 1.
Exhibit 2.
The exhibits show the current operational state for routes on Switch-3 to send all traffic to 172.16.0.0/16 through Switch-2 during normal operation.
Which single configuration change creates the desired behavior?
A network administrator wants to use an ACL, acl1, to control traffic from devices in VLAN 12 as the traffic is routed out of VLAN 12. The ACL should not control traffic within the VLAN.
Which keyword should the administrator enter at the administrator enter at the end of this command:
Switch(config)# vlan 12 ip access-group acl1____
Refer to the exhibit.
An AOS-Switch has the ACL shown in the exhibit. A network administrator then enters these commands:
Switch(config)# mac-access-list standard myACL
Switch(config-std-macl)# deny 007d.45cc.0000 0000.0000.ffff
How does this ACL treat these frames:
1 = 007d.45cc.ffff 2 = 007d.45cc.0000